Automatic pulp-press.



K. A., TORSEN. AUTOMATIG PULP PRESS.

APPLIOATION FILED JAN. 8. 1908.

910,245. Patented Jan. M1909.

7 SHEETS-SHEET 1.

Inventor; Kr 0 st em A .Tpr'serl),

K. A. TORSEN.

AUTOMATIC PULP PRESS.

APPLIOATION FILED JAIL a, 1908.

m Inventors Kristen A. Torssn, MK/

Witnesses:

Chg".

K. A. TO-RSEN.

AUTOMATIC PULP PRESS.

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Q u r m 1 Q? I? J m m o Mm t Adm .m e D M/ m TWEW 1% m K w m m m w s WK/)4! m =5 Ku- V mm .S a e w n 0 .g mflvmt W .a m W C K. A.v TORSEN.

AUTOMATIC PULP PRESS.

APPLICATION FILED JAILS. 1908. I

Patented Jan. 19, 1909.

'l SHEETS-SHEET 4.

Inventor";

K. A. TORSEN.

AUTOMATIC PULP PRESS.

APPLICATION FILED JAlm, 1908.

910,245. Patented Jan. 19, 1909.

7 SHEETS-SHEET 5.

Inventor",

s Kristen A.Tor -s n Pitt K. A. TORS EN.

AUTOMATIC PULP PRESS.

APPLICATION FILED JAN. 8. 190a.

PatentedJan. 19.1909.

'! SHEETS-SHEET 6.

Inventor; Kr-i stern A. Torsen.

0 3 8 0 0 0 0 0 o o o o o Witne sses;

C Q 'W K. A. TORSEN.

AUTCIMATIG PULP PRESS. 7

APPLICATION rum) JAN. s, 1908. 910,245. Patented Jan. 19, 1909. '1 SHEETS-SHEET v.

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11 W il I I Ill/j a No. 910,245.

like drainage facilities being provided UNITED STATES PA ENT curios.

KRISTEN A. TORSEN, OF WATERTOWN, NEW YORK.

AUTOMATIC PULP-PRESS.

Specification 02 Letters Patent;

Patented Jan. 19, 1808.

Application filed January 8, 1W8. Serial No. scones.

To all whom it may concern: I

Be it known that I KmsTnN A. Toucan, a citizen of the King cm of Norway, residing at Wetertown, in the county of Jefferson and State of New York, have invented (ertain new and useful Improvements in Automatic Pulpl resscs, of which the following is a specification.

This invention relates to improvements in pulp presses, designed for use in reducing fluid wood pulp to sheets or cakes, and the invention relates particularly to a pulp press of the class, which is entirely automatic in all of its Working.

The object of the invention is to provide a press to. be operated by a powerful fluid pressure, winch 1s capable of reducmg fluid pulp to dry or semi-dry cakes or sheets of uniform size and thiclcness convenient for. either storing or shipplng. I

A further object is to provide a pulp press which is entirely automatic in its working, and wherein, from the tune the fluid pulp is delivered to the compression chamber and the machine is started, until the resulting cakes of dr pulp are formed and ejected from the mac inc and the power is-shut oil, no manual attendance or work is required.

A- further object is to provlde a simple strong, rapid and automatic pulp press or the class, which is capable of being operated continuously for long intervals at a high speed, and wherein, owin to novel construction and arrangement 0 its parts, the device may be made of comparatively li ht materials, and may be produced, insta ed and operated with great economy as compared "with presses of the class heretofore devised and constructed.

The invention consists principally in pro- "a a'suitable base, upon which is mountrong compression-box having a resschr er therein, an opening or inlet singv d at the top of the chamber for the o 5.011 of fluid pulp, and another opening through the bottom of the chamber for the discharge of the dry pulp cakes, the press-chamber also provided with one open end, in which is disposed a platen or plunger capable of being forced into the chamber to press the Water out of the pulp; the said platen provided on its inner face with suitable drainage plates to carry ed the Water,

on the oppositewall of the press-chamber for a like purpose.

The invention further consists in rovida frame disposed in the chain er, in which1 the dry or semi-dry sheets or cakes or u vert ica ly inovablethrough the bottom opening in the chamber, for the purpose of discharging the cakes or sheets of pulp.

The invention further consists in providin means for the rapid removal of the cahes from the frame. 4

The invention further consists in roviding a powerful main pressure cylin or also mounted on the base and immovabl connected to the compression-box, the said cylare formed, the said frame being i efiect the final pressing, and then 0 erated a second time by low pressure, for t epurpose of reversing the piston and Withdrawmg the platen, to permit ofthe ejecting of the pul cake, and the refilling of the chamber wit fluid pulp for another pressing.

lhe invention rurther consists in providing a reciprocating gate to open and close the pulp inlet in the top of the prcss-cham i her, and a similar gate to open and close the outlet or opening in the bottom of the chamber.

The invention further consists in providing a number oi groups or series of automatic pressure actuated parts for controlling the operation of the main cylinder, and also for meaning and closing the inlet and outlet to said chamber. sting parts consisting chiefly of a number of pressure actuated valves, cylinders and connecting parts, preferably operated by water pressure, an each group or series arranged to operate independently of the other. And the invention further consists in providing a number or" simple timing devices to control the operation of certain parts of the machine, and in simple means for effecting the repeating of the cycle of pressing operations, to make the Working of the machine continuous for long intervals or periods.

Other features and parts of the invention will be understood from the detail descrip- The said automatic opertion which followsCi reference being had to parts of groups A, C an the accom an ing rawin s, formin a part of this spgcifib atlon, and l n which Figure 1 is a side elevation, showing the general construction and arrangement of the pulp press ready for use. Fig. 2 is a plan view of the complete machine. Fig. 3 is a front end elevation, showing a part of the main cylinder cut away exposing the piston. Fig. 4 is a rear end elevation. Fig. 5 is-a vertical longitudinal section, substantially on the line 5-5 of Fig. 2, ,showing the internal arrangement of the main cylinder, the compression-box, and several of the operating valves and cylinders, also showing means for discharging the cake of pulp'after each pressing. Fig. 6 is a partial orizontal section, enlarged, substantially on the line 66 of Fig.1, showing the platen, bottom gate and certain of the D, which are located on the base; also showing operative connections between said parts and the platen and bottom gate. Fig. 7 is a central cross-section, substantially on the line 77 of Fig. 1 (some minor parts being omitted), showing the platen and rear-end of com ression-box in elevation; also showin the ocation and arrangement of certain o the automatic operating parts employed for opening and closing the upper and lower gates. Fig. 8 is'a vertical cross-section, substantially on the line 88 of Fig. 1, showing the pulp frame disposed in the press-chamber; also showing the construction and arrangement of one set of drainage plates; also showing themeans for spreading the ulp frame and carrying away the cakes oi dry pulp. Fig. 9 is a View, substantially on the line 9-9 of Fig. 6, showin in elevation certain of the pressure actuate operating parts belonging to group D, looking rearwardly from the center of the machine. Fig. 10

is a detail horizontal section of the twopiston valve employed for operating the high pressure valve. Fig. 11 is an enlarged detail view of the pulp frame. Fig. 12 is an enlar ed detail section of the check-valve employed for timing the opening of the pulp gate.

Similar characters of reference are assigned to corresponding parts throughout the several figures.

In the drawings, 2 represents a base, upon which is mounted a compression-box, for use in reducing fluid pulp to dry or semidry cakes or sheets. This box is preferably made entirely of metal, chiefly cast, and consists of a top 3, a stationary head 4, front side 5 and rear side 6, all of which parts may be joined in a manner suitable for Withstanding the strain of a high pressure.

7 represents a platen, or movable pressurehead, which operably fits the rear open end of the compression-box. A gate or door 8,

ressure controlled.

chamber 10, and 11 is a pulp supply-pipe connectin to the inlet. -A pulp gate 12, movable horizontally the same as gate 8, forms the upper side of chamber 10, and is employed for opening and closing the pulp inlet 11. Gates 8 and 12 are both held in closed position durin the pressing of the pulp, and are arranged to open and close alternately to discharge the cake and to refill the chamber.

The fluid pulp when delivered to the chamber for pressin consists of an incorporated mixture of nely ground wood and water, the percentage of water usuall varying from 90% to 98%. After press-c amber 10 is filled with fluid pulp, gate 12 is closed, thus confining the pulp within the box, then pressure is applied to force platen 7 into the chamber. In order to take away the water and leave the dry ulp in the chamber, a grooved drainage p ate 13 is secured to the inner face of head 4, and a similar plate is secured to the inner face of platen 7, the grooves in each case facing the chamber. Perforated strainer plates 15, preferably brass, are then mounted over the grooved faces of plates 13, and form the front and rear walls of chamber 10. The perforations in plates 15 should be very small, so that little if any pulp may pass th-rou h with the water. A covering of fine wire 0 0th or like material may be substituted for. plates 15 and produce goodresults. After chamber 10 is filledwith pulp stock and the platen is forced into the chamber, the water incorporated with the pulp will be forced through plates 15 into the grooves of plates 13, and will then be carried off through ports or passages 16, referabl under suction or vacuum draft in any suitable manner.

20 represents a main pressure cylinder, mounted on the opposite end of base 2 facing the compression-box. A series of strong stay-rods 21 form a skeleton connection between the box and this cylinder. Cylinder 20 has a piston 22, and a piston rod 23 the outer end of which connects with platen 7, and by means of which pressure from the main cylinder is imparted to the platen for pressing the ulp. Piston rod 23 is supported and guided centrally by a bracket 24 mounted on the base.

The automatic Working of my pulp press is carried out by a number of valves and 0 linder of smaller and li hter construction t an the main cylinder, w ich are arranged and operated in groups or series designated by the letters A, C and D. These are disposed and mounted at different points con venient to the compression-box and main cylinder, and they are all referably operated by water-pressure, a though air or steam-may be emplo ed, and they are rovided with suitable piping and other fittings common to devices of the class. Each group is o erated independently by pressure derive from a common source. With but a single exception, these smaller valves and cylinders are preferably operated by a low pressure. Low pressure is em loyed in main 0 linder-ior the first stage 0% the pressing, t e final ressing being efiected by high pressure, tlirough the operation and control of group A, while the platen is returned after the pressing of each cake by low pressure, by the operation of the parts in roup B. A uniform high ressure might fie employed for operating a of the valves and also the main cylinder and produce good results. In carrying out the principal steps of a complete cycle'of operations necessary to form each cake, group A is first employed for operating piston 22 and platen 7 by high ressure to press the fluid (pulp; group B, or reversing the piston an platen by low .pressure;.group C for opening and closing the bottom gate for the removal of the pi ilp "cake, and group D, for opening and closing 85' the top, gate for refilling the chamber with wet pulp and also for operating a low pressure valve connected to main cylinder 20, to start the succeeding round of operations.

25 re resents a four-way valve mounted upon cylinder 20. This valve has an operating-rod 26 extending through both ends of its casing. A low-pressure inlet pipe 27 connects with a source of pressure, and an exhaust pipe 28 drains the valve. Valve 25 has pressure connections with cylinder 20 through pipes 29 and 30, by means of which piston 22 may be forced either to the leftor right. Valve 25, as shown in Figs. 1, 2 and 5 is set for pressure into main cylinder through pipe 29. Assuming that chamber 10 is filled with pulp, that gates 8 and 12 are closed, and that valve 25 is set as last described, the machine is started by turning low pressure into said valve through inlet pipe 27. The low pressure will then pass into cylinder 20, and piston 22 will begin to move, forcing platen 7 to the right to begin the pressing.

33 represents a rod connected to the lower end of the platen, by eye-bolt 84. Upon this rod is adjustably mounted oppositely facing rigid triggers or trips 35 and 36.

37 represents a three-way valve (in group A) mounted on the base, having an inlet 38, and

the inner end of rod 44 closes valve 45,

an exhaust 39, and an operating-rod 37, to which is connected a lever 37 pivoted at its lower end to the valve casing, while the free end of said lever is disposed between trips 35 and 36, in such manner that when rod 33 is moved to the right or left, valve 37 will be operated in corresponding directions. Thus when platen 7 begins its movement intopress-chamber 10, by the operation of piston 22, in the first instance, b low pressure fromvalve 25, it carries wit it rod 33, and trigger 35 engages lever 37 and swings it to the ri ht, opening valve 37 for pressure throug a 1pe 40 into a cylinder 41, (also in group A mounted on the front side of cylinder 20. Cylinder 41, which only receives pressure from valve 37, has.two pistons, 42 and 48, mounted on a rod 44, which passes out through the casing. When the water enters the chamber of piston 42, it forces both pistons and rod 44 to the right, and any water that happens to be in the opposite end of cylinder 41, will be forced out through a valve 45 and a pipe 46, until which is connected to end of cylinder 41. At the time the water enters chamber of piston 42 and acts upon the latter, it also enters a duct or passa e 47 formed in the side of the casing (see ig. 10), and is carried into the forward end of the cylinder where it in turn acts against the lar er piston 43, and drives the two pistons ack to the left. The diiierence in the area of the two pistons permits or the forward and backward movement with the same charging of cylinder 41. The time in which the return movement of the pistons may be effected is regulated by a screw-valve 48, disposed in passage 47. A spring 49 opens exhaust valve 45 as after rod 44 is moved to the left and valve 37 is reversed bytrigger 36. Rod 44 carries a trigger 44, and connects at its outer end with the operating-rod" of a high pressure valve 50, which is mounted on the side of cylinder 20, in line with cylinder 41. High pressure enters valve 50 through a supply pipe 50 and passes thence into main cylinder through a pipe 51, which connects with the chamber to the left of piston 22. High pressure, therefore, is only employed for forcing the piston of main cylinder toward the compression-box: the return or" said piston being effected by or: pressure from valve 25 thrrmgh pipe 36 t 1 the pressing, to permit of the remove the pulp cake and the refilling of the rha her, which will be explained more full low. The operation of pistons 42 am. valve 41 to the right, as described, opens valve 50 and lets high pressure into cylind r 20, while the return operation of the dc time required for the high pressure to coin plete the pressing of the pulp and the forma- 134i tion of the cake, or in other words the duration of the high pressure for pressing, is regulated b t e screwvalve 48, as explained. 'le the high pressure is in the main cylinder, passage 29 leading to low ressure valve 25 is open, and to prevent oss of the high pressure by exhausting through valve 25 and inlet pipe 27, a checkvalve (not shown? is disposed in the inlet pipe above the va ve.

As the pressure supplied to valve 25 does not 0 erate it, it is necessary to provide an auxiliary mechanism for automatically shifting said valve to effect the return of piston 22 and the platen after each pressing. To this end, I provide a lever 52, pivoted to the main cylinder at 53, and having its lower end 52' disposed in the path of trigger 44' carried by rod 44. Lever 52 forms an operative connection between groups A and B. The upper arm of lever 52 carries a counterweight 52", and a pin 54projects from th face of the lever below the weight.

55 represents a four-way valve mounted onmain cylinder 20, operated by low pressure received through a pipe 55 and exhausting' at 55". To the operating-rod of valve 55 connects an extension-rod 56, havin a slot in its outer end in which pin 54 is isposed and plays. Through the last named connections valve 55 is operated and controlled. When rod 44 travels to the left to shut off the high pressure, as described, tri ger 44 engages point 52 of lever 52 and swlngs the lever and weight to the right just over the center, then trigger becomes free. When lever 52 passes the center, it will gravitate rapidly and with considerable force by its own weight to the position shown in dotted lines Fig. 1, and in finishing its travel, in

54 engages end 57 of slot and opens va ve.

55 for pressure through pipe 59 into another cylinder 61 mounted on cylinder 20 in line with valve 25. Cylinder 61 only receives the pressure from valve 55, and as the water first enters said cylinder it forces piston 61 and rod 61" to the right. Rod 61' has abutting contact with ad usting-screw 67 on the end of connectin -rod 26 of valve 25, when the latter is set or pressure into main cylinder through pipe 29, as shown in Figs. 1,

2 and 5, and when rod 61" is forced outwardly, as described, it reverses valve 25 for pressure into cylinder 20 through pipe 30, which forces piston 22 and platen 7 back to the left. Piston rod 61" connects to'one end of a lever 62 pivoted at 62, its lower end connecting to a link 63, which in turn connects with a second link 64, the lower end of the latter being pivoted at 53, the same as lever 52. When piston rod 61" travels to the right, lever 62 and the two links 63 and 64 will be shifted to the position shown in dotted lines in Fig. 1, and in doing so link 64 will engage a projection 65 on counterwei ht 52" and carry lever 52 back to the left, or first position. As lever 52 finishes its stroke, pin 54 strikes end 58 of slot in rod 56 and reverses valve 55 shifting the pressure from said valve through pipe 60 into cylinder 61, reversin the latter and throwmg lever 62 and lin {S 63 and 64 to position shown in full lines Fig. 1, thus automatically restoring all of these parts in group B to first posltion, ready for another cycle of pressing operations. It will be noted that the parts in group B only par-- tially control low pressure valve 25, i. e. operate it in the direction to cause'the reversin" of piston 22 after the pressing.

'10 having been effected and the platen withdrawn by the o eration of the arts hereinbeforedescribe the next step 1n order will be to explain the opening of gate 8 and removal of the cake or sheet of pulp.

represents a rod (similar to rod 33) attached to platen 7, preferably near its lower end by eye-bolt 70,'and carries an adjustable trigger 70 (see Flgs. 6 and 7).

71 is a four-way valve in group C, having low pressure inlet pipe 71 and exhaust pipe 71", and having an operating-rod 72 extending throu h both ends of its casing, to one end of WhlCll is pivoted a lever 73, having its fulcrum at 73 and its free end (118- posed in the path of trig er 70". Valve 71 supplies pressure through pipes 74 and 75 to a cylinder 76, having a piston 7 6 and a piston rod 76", the outer end of the latter connecting with gate 8. The movement of platen 7 to the left or out of the chamber moves rod 70 with it, and trigger 70 engaging lever 73 opens valve 71 for pressure into cylinder 76 throughplpe 75, and forces piston rod 7 6" and gate 8 to the left, thereby opening the bottom of chamber 10 for the removal of the pulp cake through outlet 9. Gate 8 has formed on its outer corners at front and back of machine perforated lugs or arms 77, through which rods 78 pass and have free play. Rods 7 carry adjustable stops 78, by means of whlch the rods are drawn to the left in the latter half of the outward movement of gate 8. The inner ends of rods 78 are pivoted to arms 79 of a pair of bell-cranks which are pivoted to the front and rear sides of the compression-box at 7 9'.

80 represents a frame-like part (see Figs. 5, 6, 8 and 11) having a top and two side rails, which are held together by bolts or screws 80. Thisframe is disposed in the press-chamber 10 against the inner perforated face of head 4, in such position that the opening in the frame, which is preferably the same height and breadth as the inner face of platen 7', registers with the platen. Within this frame the pul cake 80 is formed by the pressure app ied to felt;- r.

the platen, the water in the pulp passing on Gate 8 being closed during the pressing, serves the part of a bottom rail for the frame. Frame is disposed in chamber 10 directly above opening 9,and is movable upward and downward through said opening.

81 represents links connected at their uper ends to arms 7 9 of the bell-cranks, the ower ends being pivotally connected to the opposite sides of the frame 80 by studs'82, which roject through 0 enings in the side walls 0 the compression on. The arrange ment of these parts is such that when gate 8 is opened, frame 80 with the pulp cake pressed into it, is forced downwardly by the operation of rods 7 8, the bell-cranks, and links 81, through outlet 9, far enough for the cake 80 to be fed in between and gripped by a pair of rollers'83 and 84 disposed beneath the compression-chamber. toller'83 is constantly driven by power applied to a pulley 85 disposed on the rear side of the machine. Roller 84: does not mesh with roller 83 and only revolves during the interval in which the cake is passing between the rollers. Roller 84 is adjustable and operates under tension, by means of springs 88 and may be made to exert sufficient pressure against the cake to positively carry it out of the frame. Springs 80 are incased in caps or boxes 86' located at opposite ends of roller 84. These rollers are driven at a speed that will insure the removal of the pulp cake from the frame 80 quickly, in order that gate 8 may be closed and chamberlO refilled with fluid pulp for another ressing without loss of time. The inner es of frame 80 are preferably beveled, as s iown, in order that the movement and suction of the platen when Withdrawn will not distort the cake or shift it in' the frame.

90 represents a lever pivoted to front side of the base at 90, the inner end of which is formed into a hook or notch 90" (see Fig. 8), adapted to receive'a projecting point 91 of one rail of frame 80 as it descends. After these parts come together, the downward movement of the frame will tilt lever 90,

and owing' to the arc of said lever and the ip W11 of notch 90", the lower end of the frame be spread slightly for the purposeof loosening the cake and allowing its removal from the frame more readily. A counterweight 93 on the outer end of lever 90 will lift the inner end soon as the frame has been returned to the press-chamber.

The pulp frame 80 is lowered by the opening of gate 8, but the closing of the gate will not raise the frame. Immediately after the cake has been removed, gate S-begins to close and the frame is then raised to its place in the chamber by a pair of heavy weights 94 suspended from one end of ropes or cables a i e other end of the ropes being attached through plates 15 and waste passages 1 5,

bellcranlt arms 79 at 95. Ropes 0e are supported at each side of top of machine by a pair of sheaves 9a" mounted brackets 89. tlwingto the positioning of the stops Y8, the raising of the pulp framewill occur with the initial inward movement of ats E g,

ihe automatic closing 01 gene 8 is enected as follows; 96 represents a rod, one 4 which is connected tothe outer endof gate 8,

by passing through a downwardly extending lug 97, (see Figs. 5 and 6) the other end hemg connected to an operatin rod 98, of a four-way valve 99 in group G, located on the base near cylinder 7 6. The free end of rod 96 is (provided with two stops 100 and 103., space some-distance apart, between which lug 97 is disposed. in order to allow some time to elapse between the openingof gate-8 I and the o eration of valve 99, stop 100 on the gate has nearly. completed its outward travel. When log 97 finally moves rod 95.

35 rod 96 wi 1 not be engaged by lug 9,? until and opens valve 99, water pressure from said valve passes through pipe 102 into cylinder 103, and drives its piston l0land piston rod 104 to the right, the exhaust from the other side of the piston passing back into valve 99 through pipe 105. When piston'rcd 1%, moves outwardly, adjusting screw 10% ages operating-rod 72 of valve 71 with orce enough to reverse valve 71', and restore,

lever 73 to position ready to be acted upon by trigger 70" carried by rod 70 when the platen is again shifted to the left. Valve 99 receives its water pressure through pipe 09' v and exhausts through pipe 99". The reversing of valve 71, which receives its supply of water from the source of pressure, sends the pressure through pipe 74 into cylinder -76,

which drives piston rod 7 6 in the directionto close gate 8. As this gate closes lug 97 by engaging stop 101 on rod 98 reverses valve 99, which in turn reverses cylinder 10%, and thus leaves all of the valves andcylirr ders in group C ready to be operated in the same manner after a succeeding pressing.

During all of the automatic operations. heretofore described, which in practice would consume but little time, pulp inlet gate 12 has remained closed, preventing the pulp stock from reaching chamber 10 while lower 1 ate 8 was opening and closing. It will now e in order to describe the several parts of group D, together with their operations, which effect the opening and closing of gate 12 and the refilling of the press-chamber 106 represents a rod (similar to rod 33} attached to the outer end of gate 8 at 103' and carries a trigger 107, die seed in the same manner as trig or 35, w iich as 8 closes, as justdescri ed, catches and operates a lever 108, connected to operating-rod 109 of a four-way valve 111 mounted on the base, and forming a part of group D, and

into a cylinder 112, t rough a p opens said valve for ressu're through it 113. Valve 111 receives its 'ressure rough a pi e 111 and exhausts rougha .plpe 111", A er the water leaves pi e 113; "itflpasse's into or through a check-Va ve 114,==wh1ch is provided on its face with a number of' size of the rooves 115. When cylinder 112 has receive enough pressure from valve 111 to open gate 12, the press-chamber will be instantly filled 'with fluid pulp which is preferably delivered under pressure, andthen ate 12 must be closed. This is done as fofiows: A rod 118, which is an extension of operating-rod 119 of a small valve 120, connects with the outer end of pulp gate 12,

. by passing through a perforated: lug. 121,

' (similar to lug 97). Rod 118 isalso provided with stops 122 and 123, arranged the same as stops 100 and 101, and having the same functions, 2'. e. to delay the opening and closingof valve 120 until near the end of the travel of gate 12. Thus when gate 12 is pulled outwardly, lug 121 catches stop 122 and operates valve 120. This valve receives the water pressure through a pipe. 124 and exhausting at 125, when operated by the leftward movement of gate 12, sends the pressure downwardly through a pipe 126 ntoa cylinder 127, and drives piston 128 and rod 129 to the right against the end of piston rod 109 of valve 111, with sufficientv force toreverse valve 111, and thus send the pressure from the latter upwardly through a pipe 130 into cylinder 112, driving piston 116 and rod 117 in the direction to close gate 12. When gate 12 closes, lug 121 engages stop 123, again reverses valve 120, sends pressure back to cylinder 127 through a pipe 120' and leaves that valve in the original position. Piston rod 117 carries a trigger 131, which on the return travel of said rod, as just described, trips a lever 132,

pivoted centrally to a bracket 133 and connecting at its upper end to a rod 134, which is an extension of operating-rod 26 of valve 25, mounted on main cylinder 20. The operation of rod 134 reverses valve 25 from the position into which it was shifted by cylinder 61, as last described, and opens said valve again for low pressure intomain cylinder 20 through pipe 29. The main cylinder will then react upon platen 7, and begin the pressing of the next cake of pulp.

The foregoing detailed explanation describes one complete cycle or round of, op erations required for the pressing of one cake of pulp, the eject-in of the cake, the refilling of the press-cham er with fluid pulp,

and the recharging of the main cylinder Each time press-chamber 10 is filled and gate 12 is closed, a subsequent pressing will b v in immediately by low pressure through 0 'va ve 25. The low pressure not being strong enough tocomplete the pressing, has strength enou h to force the platen 7 part way into the chamber, or far enough to start the-operation of valve 37 and cylinder 41, which in turn opens the high pressure valve for pressure into the maln cylinder, by which the final pressin is accom lished. The high pressure is then shut oil by the automatic reversal of cylinder 41, and then trigger 44 on rod 44 sets in motion the parts comprising group B. Piston 22 in main cylinder is then reversed by low pressure from valve 25 and the platen is Withdrawn. The outward movement of the platen cooperating with certain parts ingroup C effects the opening of lower ate 8, the ejecting of the pulp cake and the closing of said gate. The closing movement of gate 8 cooperating with certain parts in group D, then effects the openin of pulp gate 12, the refilling of the press-chamber, and the opening of valve 25,

- which is the beginnin of the next round of .pressing operations. lfiach cycle of pressing operation is the same as above described, and when the several groups of automatic parts are properly arranged and adjusted, the machine will be capable of pressin fluid pulp and reducing the same to dry ca es or sheets with great rapidity and at small expense.

It is obvious that some changes or modifications of the parts ma be made without departing from the spirit of the invention, and I therefore do not restrict myself to the precise construction and arrangement of the same as shown and described herein.

The automatic operating parts of my device may also be applied to other pulp presses of the class and materially increase their capacity as Well as to reduce the expense of their operation.

Having thus described my invention, what I claim as new and desire to secure by Let-.

ters Patent, is

1 An automatic pulp press, com rising a main cyhnder having a piston an pistonrod, a compression-chamber having an o gen end facing said cylinder, a platen opera ly dlsposed 1n the open end of said chamber mat;

opening and closing said bottom gate and for forcin said frame partially throu it said slotte o ening, independent means or restoring sai said chamber, means for opening said pulpgate to permit the refilling of said chamber and for closing said inlet automatically after the closing of said bottom gate, and a mechanism o erable by the closing movement of said pu p-gate for effecting a repetition of the pressing operation, substantially as described.

2. An automatic pulp press, comprising a main cylinder having a piston and a pistonrod a compression-chamber connected to sai cylinder and having an open end, a platen operably fitting the open end of said chamber and connected to said iston-rod, an inlet for the admission of flui pulp into said chamber, a gate to open-and close said inlet, a )ulp frame disposed in said chamber in whicli'a cake of semi-dry 111 may be formed by the inward travel 0 said platen, means for collecting and carrying away water pressed from said pulp, a slotted opening in the bottom of said chamber, a gate dispose-d horizontally in the bottom of said chamber adapted to close said opening during the pressing of the pulp, a fluid-pressurenlechanisni to automation ly open said bottom gate and also to lower said frame and the pulp cake through said opening, a pair of rollers to grip and remove the pulp cake while said frame is in the lower position, and means for effecting the return of said frame to its upper position, substantially as described. a v

3; An automatic pulp press, comprising a main cylinder having a piston and a pistonrod, a valve to supply a low pressure to both sides of said piston, a second-valve to supply a high pressure to one 'side of said piston, a single compression-chamber immovably connected to said cylinder, said chamber having a fluid pulp inlet at its top and a dry pulp outlet at its bottom, and having its inner end facing said piston 0 en, a platen slioubly fitting the open on of said clr-imber and connected to the outer end of said piston red, by means of which said platen Elli forced into or withdrawn from said cm llltl. by the reciprocal movements of said piston, a perforated strainer plate mounrd on the inner face of said plat-en, a perforated strainer plate mounted on the inner lace of the opposite end of said chamber, grooved drainage plate disframe to normal position in' posed behind each of tiuaerteiait ilat es and connected with a series of waste-water ports dis )osed in said lat-en and in the closed end of saidcham er, a sliding (gate to open and close said pulp inlet, a si ing ate to open and close said pulp outlet, a trame disposed in said chamber between, said gates, in which a dry pulp cake may be formed by the inner movement of said platen, a series of levers and links connecting said frame with said bottom gate, by means of'which said frame may be lowered through said pulp outlet to dischar e the pulp cake when said gate is opene and a pair of wei hts to carry said frame back into said 0 amber, substantially as described.

at. An automatic pulp press, comprising a V main cylinder having a piston and a piston rod, a valve to supply a low pressure to operate said piston reciprocally, a second valve to supply a high pressure to drive said piston rod outwardly, a group of inde-"I pendent pressure operated partsto partially control said low pressure valve, asingle press-chamber immovably connected to said j main cylinder, said press-chamber having a fluid pulp inlet in itstop and a. dry; pulp outlet in its bottom, and having one open end facing said main cylinder, at platen movably fitting the open end of said presschamber and connected to said piston rod, the inner "face of said platen titted with a strainer and a drainage plate, a strainer and a drainage plate mounted on the iniier face of the opposite end of said press-chamber, thesaid strainer plates forming the inner end walls of said press-chamber, a sliding gate disposed in saidpress-chamber above said platen to open and close said pulp inlet, a sliding gate disposed in said presschamber beneat said platen to open and close said pulp outlet, a frame having its lower end open disposed in said ress-chamher in a plane parallel -to said strainer plates, the lower open end thereof arranged to receive the inner end of said bottom gate, the said frame adapted to receive and hold the dry pulp remaining after each pressing of the fluid pulp, a series of levers-and links connecting each side ofs'aid frame with the bottom gate, by means of which said frame may be forced downwardly through said pulp outlet to discharge the pulp cake when said gate is opened, a pair of rollers, one power driven, the other spring-pressed, disposed beneath said pulp outlet adapted to efiect the removal of the pulp cake from said frame, and a series of weights to restore said frame to its position in said presschamber simultaneously with the initial closing movement of said bottom gate.

5. An automatic pulp press, comprising a main cylinder having a piston and a iston prod, a valve connected to said main, cy inder 13o ated partsto partial i ada tedto supply a low pressure to operate said sure valve, a

hlgh pressure valve, a

rou(p parts to contro sai press-chamber connected tosaid main cylinder, said press-chamber having a fluid pulp 1 inlet at its top and a pulp outlet at its hottom, and having one open end facing said main cylinder, a platen vertically disposed in the open end of said press-chamber and connected to one end of ner face of said 1platen fitted with a perforated strainer p a e late, a. erforated strainer plate and a e P P and a dry pulp rooved drainage plate fitted to the inner face of the op osite endlof said press-chamber facing said 7 gate disposed in the upper part of said press-chamber, a sliding-gate disposed in the bottom of said press-chamber, a frame for receivin and holding a cake of dry pulp dispose in said press-chamber directly above said pulp outlet, the nected with said bottom gate and adapted to be lowered through said ulp outlet to discharge thecake of pulp by the opening of said bottom gate, and a pair of weights to lift and hold said frame in said press-chamher while said bottom gate is closing.

6. An automatic pulp press, comprising a double-headed cylinder having a piston and,

a piston rod, a valve to supply a low pressure to both sides of said piston, a second valve. to supply a high pressure to one side of said piston, a single compression-chamber immovably connected to said cylinder, said chamber having a fluid pulp inlet in its top,

outlet in its bottom, and having its inner end facing said cylinder open, a platen slidably fitting the open end of said chamber and connected to one end of said piston rod, by means of which said platen may be forced into or withdrawn from said chamber by the reciprocal travel of said piston, a sliding gate to open and close said pulp inlet,-a pressure operated mechanism to reciprocally operate said gate, a slidable bottom to open and close said pulp outlet, a pressure operated mechanism to reciprocally operate said bottom, a frame disposed in said chamber between said gate and said bottom in which a cake of dry pulp may be formed by the inward movement of said platen, a series of levers and links connecting said frame with said bottom, by means of which said frame may be lowered through said pulp outlet to discharge the pulp cake when said bottom is open, and a pair of weights to carry said frame back into said chamber.

7. An automatic pulp press, comprising said piston rod, the in ate and a grooved drain first named plates,.a slidin said frame cona main cylinder having a piston and'a pis- ,ton rod, a valve to supply a low. pressure to pressure operated parts to partially control said low 'pressurevalve,. a single-press chamber immovably connected to 7 said cylinder, said press-chamber having a fluid pulpyinlet at its top and a dry pulp outlet at its ottom, and having said main'cylinder, a platen movably fitting in the open end of said ress-chamber and connected to one end of said piston rod, the inner face of said platenfitted with a strainer plate and also a drainage plate, a strainer plate and a drainge plate mounted on the inner face of the opposite end of said presschamber, a sliding gate "disposed in said press-chamber above said platen to open and close said pulp inlet,a ressure actuated mechanism to automatica operate said gate, a sliding gate dispose in said presschamber beneath said platento open and 'close said pulp outlet, a pressure actuated mechanism to operate said gate automatically, a frame havin disposed in the press-c amber in a plane parallel to the inner face of said platen, the ower open end thereof arranged to receive the inner end of said bottom gate, the said frame adapted to receive and hold the dry pulp remaming after each pressing of the fluid pulp, a ser1es of levers and links connecting each side of said frame with said bottom one open end facing its lower end open gate by means of which said frame may be forced downwardly throu h said pulp outlet to discharge the pulp ca e when said gate is opened, a pair of rollers, one power driven, the other spring-pressed, disposed beneath said pul outlet adapted to effect the removal o the pulp cake from said frame, means for spreading said frame to release the cake of pulp, and a series of weights to restore said frame to its position in ,said press-chamber simultaneously with the closing movement of said bottom gate, substantially as described. 7

8. An automatic pulp press, comprising a double-headed cylinder having a piston and a piston, rod, a valve to supp y a low ressure to operate said piston reciproca y, a second valve to supply a high pressure to drive said piston outwardly, a group of inde endent pressure actuated parts to partially control said low pressure valve, a single-press-chamber immovably connected to said cylinder, said press-chamber having one 0 en end facing said cylinder, a platen slidab y fitting the open end of said presschamber and connected to the outer end of said piston rod, a gate disposed in said presschamber above said platen adapted to open and close said pulp inlet, a pressure actuated mechanism to operate said gate autopul remaining in said levers and links connectin disposed in said i .disposed in said press-chamber in a a plane parallel to Y inlet, a pressure matically, a second 1gate dis osed in said press-chamber beneat said p aten adapted to open and close said pulp outlet, a pressure actuated mechanism to automatically operate said second gate, a frame having its lower endopen disposed in said press-chamber in to receive the inner end of said second gate, and said frame adapted to receive the dry press-chamber after eac pressing of the fluid ulp, a series of t 1e op o'site sides of said frame with sai secon gate, by means of which said frame maav be lowered through said pulp outlet to i pulp cake when said gate is opene and a series of weights supported by sheaves mounted on top of sai press-chamber, to raise said frame to its position in said chamber simultaneously with the initial closing movement of said second gate, substantially as described. v

9. An automatic pulp press, comprising a double headed cylinder having a piston and a piston rod, a valve to supply low pressure to operate said piston reciprocally, a second valve to supply high pressure to drive said piston in one direction, a group of independent pressure operated parts to artially control said low pressure valve, t e said parts being self-actin for the purposelof restoring themselves to drst position after operating said low pressure valve, a single-press-chamber inimovably connected to said cylinder, said press-chamber having a fluidpulp inlet inits top and a dry pulp outlet in its bottom, and having one open end or side facing said piston, a plunger slidably fitting the open end or side of said press-chamber and connected to said piston rod, a sliding gate disposed in said press-chamber beneath said plunger adapte to open and close said pulp outlet, a ressure actuated mechanism to automatica y operate said gate, a sliding gate press-chamber above said to open and close said pulp actuated mechanism adapted to be set in motion by the closing of said first named gate to automatically operate said second gate, a check-valve connected to one part 0 said last named mechanism adapted to delay the opening of said inlet gate until after the outlet gate has been closed, a frame having its lower end olpen ane arallel to and registerin with the inner ace of said plunger, the said frame adapted to receive thedr pulp remaining after each pressin of the iuid pulp, means for lowerin sai frame for the discharge of the dry pu and means for returnin said frame to sai press-chamber before t e opening of plunger adapted said pulp inlet.

10. An automatic pulp press, comprising a the inner face of said I platen, the lower open end thereof adapted l schar e the main cylinder havin a piston and a piston rod, a valve to supp y low pressure to operate said piston reciprocally, a second valve to supply hi gh pressure to operate said pis- 1 ton in one direction only, a series of independent pressure operated parts to partially partsbeing self-acting for the purpose of reversing themselves after operating said low pressure valve, a press-chamber immova )ly connected to said main cylinder, said press-chamber having a fluid pulp inlet at its to and a dry pulp outlet at its bottom, an having one openside facing said main cylinder, a platen slidably fitting the open side of sait press-chamber and connected to said piston rod, a bottom gate disposed in said press-chamber beneath said platen adapted to open and close said pulp outlet, a pressure actuated mechanism adapted to-be set in motion by the outward movement of said platen to automatically operate said bottom gate, a top gate in said press-chamber above said platen adapted to open and close said pul inlet, a pressure controlled mechanism a apted to b set in motion by the closing of said bottom gate to automatically open and close said top gate, a check-valve connected with one part of said mechanism adapted to revent the opening of said top gate until a ter the bot tom gate has been closed thereby to prevent escape of the fluid pulp through said outlet until the same is acted upon by said laten, and a series ofparts connecting wit said low pressure valve adapted to be operated by the closing movement of said top gate, thereby to recharge the main cylinder with low ressure to effect the beginning of a new cycle or round of pressing operations, substantially as described.

11. An automatic. pulp press, comprising a main cylinder having a piston and a piston rod, a valve connected to said main cylinder adapted to supply a low pressure to operate said piston reciprocally, a second valve supply a high pressure to operate said piston in one. direction, a group of pressure actuated parts to partially control said low pressure valve, a group of pressure controlled parts to operate said high pressure valve, a pressc amber connected to said main cylinder, a pulp inlet in the top of said chamber, a pulp outlet in the bottom of said chamber, aplaten vertically disposed in one end of said presschamber and connected to one end of said piston rod,the inner face of said platen fitted with a grooved drainage plate and a perforated strainer plate,a rooved drainage plate and a perforated strainer plate fitted to the chamber facing sai laten', a sliding gate disposed in the upper side of said press-chamber beneath said pulp inlet, an automatic control said low pressure valve, the said mounted on said main cylinder adapted to inner face of the opposite end of said press- P mechzinism to control and o erate said sliding gate, a ate disposed in t e bottom of the press-chain er above sa1d pulp outlet, an automatic mechanism to control and operate said gate, a frame for receiving a cake of pulp resulting from the pressing of the fluid pulp by said platen disposed in said press-j chamber directly abbve said pulp outlet, the.

said frame connected to the bottom date and ada ted to be lowered throu 11' said pulp out et to discharge the cake 0 pulpby the opening movement of said gate, and a pair 0 weights to lift and hol said frame in said press-chamber while said bottom gate is closing, substantially as described. I 12. An automatic pulp press, comprising a main cylinder having a piston and a iston rod, a valve'connected to said main ey inder ada ted to supply a low pressure to operate. said? piston reciprocally, a second valve mounted on said main cylinder ada ted to supply a high pressure to operate sai piston outwardly, a parts to partia y control said low pressure valve, a series of ressure controlled arts to operate said hi pressure-valve, a c 180kvalve carried by t 1e latter series adapted to prolong or shorten the duration of the high ressure in said main cylinder, a press-cham- Eer connected to said main cylinder, said press-chamber havin a fluid pulp inlet in 1ts top and a dry pu p outlet in its bottom, and having one open end facing said main cylinder a platen operatively' fitting the 0 on end of said ress-chamber and connecte to one end of said piston rod, a slidin gate dis osed in said press-chamber beneat said pu p inlet, an automatic pressure controlled mechanism to operate said gate, a second gate dis osed in the bottom of said press-chamber a ove said pulp outlet, an automatic pressure-controlled mechanism to operate said gate, a frame adapted to receive 'a cake of dry' ulp resultin fromthe pressulp by sai platen, disposed ing of the flui in said ress'c amber directly above said pulp out et, the said frame connected to the ottom gate and adapted to be lowered through said pulp outlet for the ejecting of the pulp cake by the opening of said gate, a

pair of'rollers disposed beneath said press? chamber adapted to effect the remova-l'of the ulp cake fromsaid frame and a pivoted ever to spread said frame for the purpose of loosening the pulp cake, substantially as de scribed.

13. An automatic pulp press of the class described, comprising a main cylinder having a piston and a piston rod, a valve con nected to said main cylinderadapted to sup-fv ply a low pressure to o erate said piston re ciprocally, a second va ve mounted on said main cylinder adapted to supply a high pres-.

sure to operate sa1d piston 1n one direction,

a group of pressure-actuated parts to effect fder adapted to p l ng or? shortens Ito-.saidmain cylinder, said press-chamber pulp outlet at its bottom, and a'vin' f o i pen side facing'said main cylinder ,'a p ate-n operatively .fittm press-chamber an said roup of pressure actuated outward movement of sai main cy inderiitoibegin the pressingjof-it pulp injfsaid" press-chambegfa second valve connected to said main cylindenadap lged- -to.be operated reciprocally by the 'ini 1a inward movement of said platen, to su'ppltyc {high pressure ,tos'aid main cylinder fore the operation of said piston in theopposite d1rect1on,a series of pressure-controlled}parts I rto open and close said highpressure valve, a check-valve carried bya,ftwo-pistonjc ling" tion of theliigh pressure in said ma qu der,.,a press-chamber connected iimmovably having a fluid pulp inlet at its to and a;

in the open sideofsaid' connected to one' gend of.- said piston rod asliding gate disposed in;v

ress-cham er beneath said pulp ..inlet,'0-l a sli ing ate disposed in said press-cham-Tf berbeneat1 said aten and above said pulp outlet, a frame a apted to receive a cake of I pulp resulting from the pressing of the fluid. V pul disposedin said presschamberrlldi- I 5 rect y above said pulp outlet, the said framef connected withsaid bottom gate and adapted 1, to be lowered through said pulp outlet by the, final opening movement of sa1d gate, aipeir of rollers disposed beneath thepulp outlet adapted .to gr p and carry away the cake of I' pulp fromsaid frame, and a pairof weights to raise said frame simultaneously with the initial closing movement of said bottom: ga t 14. An automatic pulp press, com risin a main cylinder having a piston an 'a-' i ton rod, a press-chamber immovably on nected to said main cylinder having-one end facing said main cylinder, and haym a pulp inlet through its top and a "pulp-out let through itsbottom, a (platen movably;j fitting the open-end of sai press-chamber} and connected-to one end of said piston rod,;;

aslidable gate disposed in the bottom of said press-chamber above said pul outlet,

valve operable by said platen an a cylinder;-

opemtively meted Said te adapted outlet at, each platen, asliding? open and close said pug) pulp gate disposed in'the top of said'jpres's chamber beneath saidpulp inlet,"-a1'valve operable by saidf'lower; gate-and a cylinder}; operatively connectedvto said pulp-gga a opted to open and close said :pulp "inlet after the closlng of said lower gate, {a :valve connected with said main cylinder adapted ,7

erated by the. closing movement-of? gatelte supply low" pressurefto said sa i 1 :fecting the final pressing of the pulp and for shutting off said high pressure, an a 'group of automatic pressure actuated parts adapted to rei'erse said low pressure valve and effect I the return movement or travel of said piston I and said platen.

15. An automatic pulp press, comprising a double headed cylinder having a piston and a piston rod, a valve to supply a low pressure to both sides of said piston, a second valve to supply a high pressure to one side of said piston, a single press-chamber connected to said cylinder, said press-chamher having a fluid pulp inlet at its top and a" dry pulp outlet at its bottom, and having one open end facing said cylinder, a plunger slidably fitting the open end of said presschamber and connected to one end of said piston rod, by means of which said plunger may be forced into or withdrawn from said press-chamber by the reciprocal movements of said rod, a sliding gate to ope and close the pulp inlet, a pressure-controlle mechanism to reciprocally operate said gate, a slidable bottom-to open and close said pulp outlet, a pressure-controlled.'mechanism to reciprocally operate said bottom gate, and a frame disposed in. said' press-chamber between said gate and said bottom in which a cake of dry pulp may be formed by the inward movement of said plunger, substantially as described.

16. An automatic pulp press, comprising ama-in cylinder having a piston and a piston rod, a valve to supply a low pressure to operate said piston'reciprocally, a second valve to supply a high pressure to drive saidpiston in one direction only, a group of independent pressure actuated parts to partially control said low pressure Valve, a' single press-chamber immovably connected with said main cylinder, said press-chamber having an inlet for the admission of fluid pulp at its top, and an'outlet' for the discharge of dry pulp at its'bottom, and having one open end facin .said main cylinder, a platen connected to t e outer end of said piston rod and slidably fitting in the open end of said press-chamber, a sliding gate disposed in the press-chamber above the platen to open and close said inlet, a pressure-actuatcd-mechanism to operate said gate automatically, a sliding bottom disposed in the press-chamber beneath said platen to close and open said outlet, a pressure-actuatedmechanism to automatically operate said bottom, and a frame having its lower endo en disposed in the press-chamber in a p ane parallel to the inner face of theplaten, the lower open end thereof adapted. to receive the inner-end of said bottom, the saidv frame adapted to be held in the ress-chamber during the pressing of a ca e of pulp,

and then lowered through said outlet by the opening of said bottom to discharge said cake,substantially as described.

17. An automatic pulp press, comprising a main pressure cylinder having a piston and a piston rod, a valve to supply a low pressure to both sides of said piston, a second valve to supply a high pressure to one side of said piston, a double piston cylinder to control said high pressure valve, a single press-chamber immovably connectedto said cylinder and having one open end facing said cylinder, a fluid pulp inlet in the top of said press-chamber, a dry pulp outlet in the bottom of a said presschamber, a slidable pressure-head fitting the open end of said press-chamber and connecting to one end of said piston rod, a sliding gate operativel disposed in said press-chamber between said pulp inlet and said pressure-head, a pressure-actuated mechanism to reciprocallyoperate said gate for opening and closing said pulp inlet, a slidable bottom operatively disposed in said press-chamber between said pulp outlet and said pressure-head, and a pressure-actuated mechanism to reci rocally operate said bottom for opening and closing said pulp .outlet, substantially as described.

18. An automatic pulp press, comprising a press-chamber havmgone open end, and havin an inlet for fluid ulp at its top and an out et for dry pulp at its bottom, a laten movably fitting in the open end 0 said ress-chamber, a ulp gate slidably fitting 1nthe open end 0 said press-chamber above said platen, a bottom gateslidably fitting in the open end of saidpress-ehambcr beneath said platen, a vertically movable pulp frame disposed in said press chamber normally registering with the inner face of said platen, a main pressure cylinder immovably connected to said press-chamber and oper-- atively connected to said platen, an auxilf iary cylinder adapted to operate said pulp gate reciprocally, an auxiliaryv cylinder adapted to operate said bottom reciprocally; and also to effect the lowering of said pulp frame into said pulp outlet, and a pair of Weights to raise said pulp frame to its osidescribed.

Intestimon whereof l'aflix my signature in presence 0 two witnesses.

KRISTEN A. TORSEN. I

- Witnessesa 1 HARRY KAY s HARRY W. ones.

, tion in said press-chamber,substantial y as 

